Modular tool for measuring disassembly torques

Abstract

A modular tool (10) for measuring the disassembly torques of a metal shield (36) of a seal (35) for a bearing unit (30). The tool (10) has a torque gauge (20) equipped with a hexagonal key (22). A base element (40) is rotationally integral with the torque gauge (20). A modular element (50) is rotationally integral with the base element (40) and with the shield (36) of the bearing unit (30). The tool includes a support platform (6) for the bearing unit (30). The base element (40) is invariable with respect to the size of the bearing unit (30). The modular element (50) has a variable size according to the size of the bearing unit (30).

What is claimed is: 
     
         1 . A modular tool for measuring disassembly torques of a metal shield of a seal for a bearing unit, the bearing unit having an axis of rotation, a radially outer ring, and a radially inner ring, the radially outer ring being stationary having a seat, the radially inner ring being rotatable, the shield being mounted by means of interference in the seat of the radially outer ring and has a plurality of through-holes, the modular tool comprising:
 a torque gauge having a hexagonal key;   a base element rotationally integral with the torque gauge and which is configured, during use, to assume the axis of rotation of the bearing unit as an axis of symmetry, the base element being invariable with respect to the size of the bearing unit;   a modular element rotationally integral with the base element and configured to be rotationally integral with the shield of the bearing unit, the modular element being configured, during use, to assumes the axis of rotation of the bearing unit as an axis of symmetry, the modular element having a variable size according to the size of the bearing unit; and   a support platform for the bearing unit, the support platform configured to stably lock both the radially outer ring and the radially inner ring.   
     
     
         2 . The tool according to  claim 1 , wherein the base element comprises:
 a hexagonal head configured to engage the hexagonal key of the torque gauge so that a relative rotation of the torque gauge and the base element is prevented;   a cylindrical body integral with the hexagonal head; and   a plurality of teeth integral with and protruding axially from the body.   
     
     
         3 . The tool according to  claim 2 , wherein the modular element comprises:
 a cylindrical body;   a plurality of through-slots formed with a circumferential arrangement inside the body and having a cross-section substantially equivalent to a cross-section of the teeth of the base element so that respective teeth can engage inside respective through-slots; and   a plurality of cylindrical pins integral with the body from which the pins protrude axially and having a circular cross-section substantially the same as the circular cross-section of the holes of the shield so that respective pins can engage inside respective through-holes.   
     
     
         4 . The tool according to  claim 3 , wherein the teeth of the plurality of teeth and the slots of the plurality of slots are arranged circumferentially at 90° with respect to each other and have a cross-section in the shape of circular crown segment. 
     
     
         5 . The tool according to  claim 3 , wherein the pins of the plurality of pins are four in number and arranged circumferentially at 90° with respect to each other. 
     
     
         6 . The tool according to  claim 3 , wherein for larger diameters of the bearing unit, the pins will be positioned radially with respect to the axis with a proportionally greater radius. 
     
     
         7 . The tool according to  claim 5 , wherein for larger diameters of the bearing unit, the pins will be positioned radially with respect to the axis with a proportionally greater radius. 
     
     
         8 . The tool according to  claim 1 , in combination with the metal shield and the bearing unit.